Valve



May 19, 1942. Y R. l.. ol-ILS 2,283,281.

' l VALVE Filed June 12, 1941 nannies as te, -rea VALVE ration oi TexasApplication June l2, 1941, Serial No. 397,698

2 Claims.

This invention relates to valves and more particularly has reference tovalves with retractable closure elements.

A number of diierent types olfv valves with retractable closure membershave been provided in which the closure members are retracted from theirseats prior to movement to reduce the friction between the closuremembers and the valve seats. Various means have been provided foreffecting the retraction of the closure members from the seats in whicha force is applied to the closure members to simultaneously retract anddisplace the same. Under high pressure conditions the prior devices havenot always worked as satisfactorily as is desirable.

The major object of thisinvention is to pro- .vide means for positivelyretracting closure members from their seats prior to movement of theclosure members over the seats. p

Another object of this invention is to provide a valve with retractableclosure members and. mechanical means for positively .retracting theclosure members from their seats.

Still another object of this invention is to provide a valve withretractable closure members and means for positively retracting theclosure members from their seats and 'having a lost-mo- Y tionconnection with means for displacing the closure members over the seats.

A further object of this invei'itionv is to provide a valve withretractable closure members, a car-` rier for supporting said members,an operating device having a lost-motion connection with the carrier,and means associated with the operatingy device for positivelyretracting the closure members from their seats. l

Other objects of this invention will be apparent from the followingdescription and drawing.

In the drawing: A

Fig. 1 is an axial sectional view of a valve embodying the concept ofthe present invention.

Fig. 2 is another axial sectional View taken at right angles to the viewrepresented in Fig. l.

Fig, 3 is a horizontal sectional view taken on line 3 3 of Fig. l. A

As shown in the drawing the valve according to the present inventioncomprises a valve body or casing I provided with a cylindrical bore 2forming a valve chamber. Ports 3 and t serve for the iniiow and outiiowof fluid into and out of the chamber 2. The direction of ow of the fluidis immaterial to the operation of the valve structure.

The lower end of the valve chamber is closed be formed as -a separateelement connected to the valve body. A center recess 5 is provided inber 9.

A carrier II) is rotatably mounted within the valve chamber 2 and isprovided with a bearing pin II on its lower end which is received in therecess A recess or socket is provided i`n the upper end of the carrierI0 in which is rotatably mounted the lower enlarged end I 2 of the stem9.

The opening in the bonnet I through which l the stem 9 extends is of adiameter somewhat s larger than that of the stem 9 to -provide a spacelfor packing I3, which is compressed by means of a plunger I which ismoved to adjusted positions by means of nuts I5 on the studs it. Withthe above described construction the carrier it is rotatably mounted inthe bore 2 for rotation about the lower bearing pin it and about thelower end i2 of the stem 9 or rotatable with the stem 8 which rotates inthe opening in the bonnet l.

The carrier It comprises a body having a Iiow opening Il extending`transversely therethrough which is adapted to be brought into registerwith ports 3 and t to permit free ow of ilud from one port through the.ow opening to the other port. On each side oi the flow opening Il thecarrier is iiattened to provide avspace between the body oi carrier idand the wall of the cylindrical bore 2 for the segmental closure membersi8. Seating surfaces it are provided on caid closure scents adapted toengage the wall of the cylin- 1 drical bore. Surfaces i@ may be of metalor of resilient material to insure a tight seal with the wall of thebore 2.

Adjacent the upper and lower ends of the carrier i@ circumferentialanges 26 and 2l are pro- Y vided. These ilanges are provided withdiametrically opposed radially extending slots 22 in which are receivedupwardly and downwardly extending lugs 23 and 2d of the closure segmentsi8. This construction enables the closure members I3 to be mounted bymeans of their lugs 23 and 2d in the slots 22 in the end llanges ofthecarrier i@ for radial movement toward and away by an integral closure 5but which obviously may 55 from the cylindrical surface of the chamber2.

Springs 25 positioned between` the carrier I0 and the closure members I8resiliently urge the closure members against the cylindrical surface of'stem or actuating means 9 and is positioned -just above the upper iiangein a position tov engage the ends 30 of the bell-crank levers 26.

With the cam 29 in the position shown in Fig. 3 of the drawing theclosure members I8 will be forced against the cylindrical surface of thebore 2 by means of the springs 25. When, however, the stem 9 is rotated,cam 29 will be moved to a position (rotated relative to the carrier I0)to 'force the ends 30 of the bell-crank 26'outwardly and thereby causethe ends 28 of the bellcrank levers 26 to move inwardly retracting theupper ends of the closure members from their seats. This will enable thecarrier I0 to be rotated without undue friction due to engagement of theclosure members with the cylindrical surface of the chamber 2.

As is clearly shown in Fig. 1 of the drawing the enlarged lower end I2of the stem 9 is provided with'outwardly extending lugs 3l which projectinto a sector-shaped recess 32 in the upper portion of the carrier I0.The sector-shaped recess 32 is of al length suiicient to permit the stem9 to be rotated relative to the carrier through a distance to enable theclosure segments I9 to be retracted from their seats before rotarymovement is imparted from the stem 9 to the carrier I0. The. connectionprovided by the pins 3| and slots 32 serves as a lost-motion connectionto permit limited rotary movement of the stem 9 relative to the carrierI9.

A valve construction as herein described with the lost-motion connectionbetween the .operating stem 9 and the carrier I0 enables the' closuresegments to be positively retracted from their seats prior to movementof the segments over the seatsf This construction is particularlyadvantageous' and simple in that a single actuating means, i. e., thestem 9 serves both as a means for positively retracting the closure seg-'ments from their seats and as a means for positively rotating thecarrier I0 to displace the closure segments from opened to closed andfrom closed to open positions.

Having described my invention, I claim:

l. A valve comprising a valve body having a ported valve chamber, acarrier rotatably mounted in said chamber, a closure member mounted onsaid carrier for Vdisplacement by the carrier to port opening andclosing positions in said chamber and retractible from the wall of thechamber, an actuating stem rotatably mounted coaxially of said carrierwith a lost-motion connection between the stem and carrier, a rotary camxed on the stem' and having portions of different radial distances fromthe axis of the stem, a lever mounted on the end of the carrier adjacentthe stem, said lever having one arm extending axially of the carrier andengaging the end of the closure member adjacent the stem and a secondarm in a position to bel engaged by the cam and displaced thereby uponrotation of the stem and cam relative to the carrier to effectretraction of one end oi' the closure member. 4

2. A 'valve comprising a valve body having a ported valve chamber, acarrier rotatably mounted in said chamber and having a disc-like flangeat each end thereof, said -flanges having axially and radially extendingslots' in the circumferential portions thereof, a closure member in saidvalve chamber and having lugs at the ends thereof positioned in theslots in the flanges of the carrier for displacement of the closuremember to port opening and closing positions in the chamber, anactuating stem rotatably mounted coaxially of said carrier with alost-motion connection between the stem and carrier, a rotary cam fixedon the stem and having portions of different radial distances from theaxis of the stem, a lever mounted on the'end of the carrier adjacent thestem, said lever having one arm extending axially of the carrier andengaging the lug of the closure member adjacent the stem end of thecarrier and a second arm in a position to be engaged by the cam anddisplaced thereby upon rotation of the stern and cam relative to thecarrier to effect retraction of one end of\ the clure member to breakadhesion between the closuremember and the valve chamber wall.

ROBERT L. OHLS.

